COMPSAC 91 : : proceedings of the Fifteenth International Computer Software & Applications Conference held September 11-13, 1991 at Kogakuin University, Tokyo, Japan / [electronic resource] / editor: George J. Knafl ; sponsors: IEEE Computer Society, Information Processing Society of Japan.. — Los Alamitos, Calif. : : IEEE Computer Society Press,, 1991.. — xxi, 730 p. : : ill. ; 28 cm.